Stop motion device for revolving box looms



(No Model.) 2 Sheets-Sheet 1.

T. F. WARRINGTON. STOP MOTION DEVICE FOR REVOLVING BOX LOOMS.

No. 475,477. Patented May 24, 1892.

WITNESSES INVENTOR 2 Sheets-Sheet (No Model.)

T. F. WARRING-TON. STOP MOTION DEVICE FOR REVOLVING BOX LOOMS.

No. 475,477. Patented May 24,1892.

/ INVENTOR V7I'IENESSES %/m )6 3/ 6 UNITED STATES PATENT OFFICE.

THOMAS FRANCIS I/VARRINGTON, OF PHILADELPHIA, PENNSYLVANIA.

STOP-MOTION DEVICE FOR REVOLVING-BOX LOOMS.

SPECIFICATION forming part of Letters Patent No. 475,477, dated May 24,1892.

Application filed June 13,1890. Serial No. 355,328. (No model.)

To all whom it may concern.-

Beitknown that I, THpMAs FRANCIS WAR- RINGTON, of Philadelphia, in theState of Pennsylvania, have invented certain new and useful Improvementsin Stop-Motion Devices for Revolving-Box Looms, whereof the following isa specification, reference being had to the accompanying drawings.

My invention relates to what are usually known as revolving-box orcircular-box looms, in which the shuttles are seated in a rotating frameor box; and its object is to afford a means of stopping the loom in caseanyshuttle fails to be thrown home into its seat.

In the accompanying drawings, Figure 1 represents a partial sideelevation of the frame of the loom, indicating, without elaboration ofdetail, the general relation of the rotating box and stop-motion devicesto the other parts. Fig. 2 is a view, partly in verticaltransversesection, through the box, and partly in side elevation, of thestop-motion devices adjacent thereto. larger scale, showing the detailsof one of the levers which are connected with the shuttlebox todetermine the action of the stop-motion.

In the general View of Fig. l the housing or frame of the loom isindicated at A, the frog at B, the sword or oscillating frame of thelathe at X, and the rotating shuttlebox at D. This box is constructedand actuated in the usual manner in this class of looms and is in theinstance shown adapted to receive seven shuttles, as indicated in Fig.2, where the cavities or seats for the shuttles are shown at D. Withineach of said cavities and upon the rear side thereof is a movable stripK, which may either be hinged to the cavity or may be of thin elasticmetal fastened upon one side or end, the other being free to moveoutward or away from the shuttle d. This strip is so arranged withrelation to the size of the cavity D and diameter of the shuttle as thatwhen the shuttle is home the strip will be slightly shifted or sprungoutward thereby, resuming its normal position, however, when the shuttleleaves the cavity. Adjacent to each strip K and upon the rear sidethereof Imount the devices for communicating this outward move- Fig. 3is a view, on a still.

ment of'the strip to the other devices hereinafter to be described,which constitute the stop-motion proper. Said communicating devicesconsist of bell-crank levers mounted in proper relation to the strips Kin the following manner:

Intermediate between the shuttle-seats D, I form in the periphery of thebox D deep cavities B, extending radially inward and communicatinglaterally with one of the shuttle-cavities D. The bell-crank lever M ispivoted at N, with one of its arms extending through the opening intothe cavity D and in contact with the outside of the strip K, suchcontact being maintained by means of a spring L, normally throwing thearm in that direction. The other arm of the bell-crank when in theinnermost position (corresponding with the normal position of the stripK) lies flush with the outer periphery of the box; but when said strip Kis sprung or turned outward by the presence of the shuttle said arm ofthe bell-crank M is thrown out of the cavity and beyond the periphery ofthe box, as indicated by the dotted lines. It is upon the motion of thislever that the action of the stop-motion depends.

The remaining parts will now be described: Upon the front of theshuttle-box frame A is mounted in suitable bearings a rock-shaft J,extending across the front of the lathe, and at each end of saidrock-shaft is rigidly attached a finger or dagger 0, adapted to engagewith a stop or shoulder S upon the frog B. WVhen thus engaged, themotion of the lathe toward the breast-beam is arrested and the loomconsequently stops. A slight movement of the rock-shaft suffices,however, to turn the finger C upward sufficiently to clear the shoulderS and ride up on the top T of the frog, thus not interfering with theoscillation of the lathe. At the end of the rock-shaft is rigidlyattached a lever-arm I, to the lower end of which is pivoted a link G,the other end of said link being pivoted at U to a long lever-arm E,rigidly attached to a short shaft V, whose bearing is in the upper endof a curved arm or bracket H, mounted upon the box-frame A andencircling a portion of the shu ttle-box I). A shorter lever-arm F,rigidly attached to said shaft V, overhangs the shuttie-box with itsextreme end close to the pe riphery thereof in line with the cavitieswhich contain the bell-crank levers M, so that when the arms of saidbell-cranks are in their outermost position the lever-arm F will beraised thereby, this position corresponding tov the presence of theshuttles in their boxes. raisingof thelever-arm F throws the long arm Eto the left, shifting the link G toward ,the breast-beam and turning therock-shaft .I by means of the arm I, so as to raise the dagger 0 clearof the shoulder S, as indicated by the dotted lines in Fig. 2. Hencethemotion of the lathe will not be checked, and so long as the daggerrests upon the upper surface T of the frog the lever F will not dropdown upon the surface of the shuttle-box, but will be supported clearthereof throughout the remaining portion of the forward movement of theloom. When, however, the return of the lathe takes place and the shuttleleaves the box, the strip K resumes its normal position,the bell-crank Mthereupon turns down into its cavity, and the lever-arm F drops intoclose proximity to the surface of the box D, as indicated by the solidlines. This positionof the lever-arm correspond with a position of therock-shaft J, which would ment with the shoulder S, so that as the lathemoves forward the dagger will strike the shoulder and stop the loom.Hence it will be seen that the normal tendency of the stop-motion deviceproperisto stop the loom, said condition continuing during all the timethat the shuttle is out of the box or on its way through theshed. It isthe presence of the shuttle in its box which alone prevents theoperation of the stop-motion devices, so that any failure of the shuttleto be thrown home necessarily resultsin stoppage at or before the end ofthe pick. shuttle-box is of course effected during the period when theshuttles are home-via, during the forward movement of the latheand thisperiod corresponds to that position of the'parts in which the dagger issupported upon the top surface T of the frog. This The The rotation ofthe support of the dagger relieves the shuttlebox of all pressure fromthe upper end F of the lever, so that the box is free to rotate withoutobstruction. this feature is not found in any device of the same generalcharacter heretofore used, in all of which the lever was held with moreor less pressure against the surface of the box at all times. In myimprovement it is only in contact with the box or with the bell-cranksduring that period when the box does not retate, and when, consequently,such pressure p isimmaterial.

I am aware thattheuseof a stop-motionlever actuated by one end ofaplunger whose other end extends within the shuttle-cavity of aretatable shuttle-box is not, broadly speaking, new, such a device beingshown in German Patent No. 30,515, and I therefore disclaim the subjcot-matter thus shown. In suchprior device, however, the stop-motionleveris not held clear of the shuttle-box during the period of rotationof the latter, andhence lacks the advantages due to my improvement, asabove set forth.

Having thus described my invention, I

claimbring the dagger C 1nto range of engage- The combination of therotatingshuttlebox, the bell-cranks arranged within the periphery of theshuttle-box between the shuttle-seats,the movable stripsarranged withinthe shuttle-seats and in contact with one arm of each of saidbell-cranks, the oscillating frame carrying said box, the rocking daggermounted upon said frame, the frog having a f shoulder adapted to engagewith said dagger, the stop-motion lever having one arm arranged inproximity to the periphery of the me'nt of the bell-cranks, and means,substantially as described, whereby the other end of said stop-motionlever is connected with the rocking dagger.

THOMAS FRANCIS WARRING'I'ON.

Witnesses:

JAMES H. BELL, HENRY U. PAUL, Jr.

So far as I am aware shuttle-box and within the range of move-

